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Finding the Fourth Proportional to 100,008.20, 149,992.50 and 28,939.16

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Solution

The fourth proportional to 100,008.20, 149,992.50 and 28,939.16 is: 43,403.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,008.20 : 149,992.50 = 28,939.16 : x
  2. Step 2: Convert to fraction form
    100,008.20/149,992.50 = 28,939.16/x
  3. Step 3: Cross multiply
    100,008.20x = 149,992.50 × 28,939.16
  4. Step 4: Simplify right side
    100,008.20x = 4,340,656,956.30
  5. Step 5: Solve for x
    x = 4,340,656,956.30/100,008.20
  6. Step 6: Final answer
    x = 43,403.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.